Specific surface areas (S_BET) of pure TiO₂, 1% Ag–TiO₂, 1% Fe–TiO₂ and 1% Ag/1% Fe–TiO₂.

Samples	S BET (m2 g−1)
Pure TiO2	63.8
1% Ag–TiO2	59.4
1% Fe–TiO2	16.1
1% Ag/1% Fe–TiO2	49.8